Extech Instruments 7630 Operation Manual page 37

Rear Panel Controls (Continuing)
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4. GND TERMINAL
This terminal is where the Ground or Earth terminal from the adapter box is connected.
5. PROBE HI / PROBE LO
Probe HI terminal is an input to one side of the MD(measuring device) and will be enabled
during a Touch Current test when ever Probe-HI has been selected at setup. This terminal is
provided for performing Enclosure leakage or Applied Part leakage tests. When run tests and
Touch Current tests are not being performed, this terminal is isolated from the run test and
Touch Current test circuits.
Probe LO terminal is an input to one side of the MD(measuring device) and will be enabled
during a Touch Current test when ever Probe-LO has been selected at setup. This terminal is
provided for performing Applied Part leakage tests and is always used in conjunction with
the Probe-HI terminal. When run tests and Touch Current tests are not being performed, this
terminal is isolated from the run test and Touch Current test circuits.
6. CHASSIS GROUND (EARTH) TERMINAL
This terminal should be connected to a good earth ground before operation.
7. FUSE RECEPTACLE
To change the fuse, unplug the power (mains) cord and turn the fuse receptacle
counter-clockwise. The fuse compartment will be exposed. Please replace the fuse with
one of the proper rating.
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